Sliding-door lock.



H. P. FRANKLIN.

SLIDING DOOR LOOK. APPLICATION FILED MAY 13, 1912.

Patented July 16, 1912.

, Inventor: Mar 4. $WMMM in the borough of Brooklyn,

\ Sliding-Door Locks,

panying drawings in closed elevator door, to

lock is attached. Fig. 2 IS a fragmentary,

HUBERT F. FRANKLIN, 0F BBOOKLYI W, NEW YORK, ASSIGNOR TO RELIANCE BALL- BEARING DOOR HANGER COMPANY, OF NEW YORK, N. Y

YORK.

A CORPORATION OF NEW SLIDING-DOOR LOCK.

Specification of Letters Patent.

Patented Julyl6,1l912.

Application filed May 13, 1912. Serial No. 696,897.

To all whom it may concern:

Be it known that I, HUBERT F. FRANK- LIN, a citizen of the United States, residing county of Kings, State of New York, have invented certain new and useful Improvements in of which the following is a specification, reference being had to the accompanying drawings, which form a part hereof.

This invention relates to locks for sliding doors.

It has for its object to simplify the construction of such locks, to reduce the number of parts thereof, to eliminate spring or like catch-actuating means, to cheapen the cost and to provide a lock which may be readily fitted to any sliding door.

For purposes of description, the present invention is herein illustrated as attached to anelevator door of usual construction.

Reference is now to behad to the ,accom- Figure 1 is a viewof the inner side-of a enlarged view of the parts of the device when in locking position. Fig. 3 is a view taken on the plane indicated by the line 3.3 in Fig. 2, looking in the direction of the arrows.

0n the inner face of the casing a in. which the door b slides, is a swivel block 0 mount.- ed on a bracket cl readily atti achable to the casing by screws 6.

The swivel block 0 cylinder havingdiametrically opposed apertures c in the walls thereof to receive a re which may be secured readily and adjustably in the block 0 by aset screw 0 I On the door 6 preferably adjacent the in nor edge thereof and at a convenient height, is secured a plate g on which is mounted a second swivel block g of the same construc tion as that above described, save that no set screw is employed as the rod f is adapted to have afree sliding movement through the apertures g in the wallsoftbe block-- ()n the plate 9 in juxtaposition to the swivel block 9 is pivotally attached an operating lever h-liaving a depending arm h provided. with a suitable handle h for a purpose to be hereinafter set forth. The other arm h of the operating lever h extends approximately at right angles to the depending arm which the improved axes of the swivel block 0, .g.' the pivotal support if and the flange h may be obtained by raising or lowering the may be formed as securing them to their respective supports.

toward the casing a.

723 and has a flange h formed 'on its end in a plane normal thereto.

The weight of the depending lever arm h is so disposed with relation to the pivotal I support h of the lever h as to cause the arm to hang in a substantially vertical position, while the lever it has its arms h and it so related. angularly that when the depend ing arm h is in a substantially vertical position the flange k lies on a line intersecting the axes of the swivel block 9 and the pivotal support it when the door is closed. This flange h may be moved from such position, however, by grasping the handle k and swinging it toward the swivel block g.- This swinging movement may be limited by a stud is mounted on the plate g, while if desired, another stud k may be'provicled to limit the movement of the handle it in the opposite direction.

From the above description it will be a, is secured in the said block aby the screw 0 when the opposite end of the rod f abuts against said flange h* in the closed position of the door. Movement of the door is then prevented as the flange carrying arm it lies parallel to the rod 1 and there is no tendency for the lever g to swing on its pivotal support it The necessary alinement of the the swivelblock platesd and g relatively to each other before Inthis initial adjustment it will be understood that the rod f should be mounted in an inclined position so that the flange h may be more readily swung out of its path, and so that the two swivel blocks will have sufiicient angular relation when the door is open to maintain the rod f inside the casing in a substantially vertical position.

In operation, the door may be opened by swinging the/flange h" downward out of the path of the free end of the rod 1 after which continued pressure on the handle 72? causes the door to slide in thecasing. The swivel g becomes a moving fulcrum for the rod 7 and swings the latter. upward and inward open the angular relation of the swivel c on the casing. a and the swivel g on thedoor When the door isunderstood that the rod f, which must be at v least long enough to extend from the flange 7a through the swivel block a on the casing the free end of the rod f.

While the swivel block 0 constitutes a dei. sirable element for securing the rod to the casing, -it is to be understood that many equivalents therefor maybe'employed. In

fact, a swivel mounted as a separate element may be omitted entirely and the fixed end of the rod may be bent at right angles and secured in a recess in the casing. The same may be said of the swivel block g on the door. The function of this block is primarily to guide the rod f in its movement and so it will be readily seen that any guiding means which permits the rod to swing through ,an angle of approximately ninety (90) degrees may be used.

What I claim is:

i 1. The combination with a casing and a sliding door, a locking device comprising a swivel mounted on the casing, a rod secured to said swivel, a second swivel carried by the door'and in which the rod is slidably disposed and a locking member mounted on the door and movable across the free end of the rod. r

2. In combination with a casing and a sliding door, a locking device comprising a swivel mounted on'the casing, a rod secured to said swivel, a second swivel carried by the door and in which the rod is slidably dis posed, an operating lever mounted on the door and having an arm normally parallel to the rod, a flange carried by said arm, and an operating handle carried by said arm to oscillate the same to move the flang across the free end of the rod. 1

3. In combination with a casing and a sliding door, a locking device comprising .a swivel mounted on the casing, a rod secured thereto, a swivel mounted on. the door to which the rod is slidably attached, said swivels being in different horizontal planes,.

and locking means secured to the door movable across the free end of the rod.

4. In combination with a casing and a sliding door, a locking device comprising a rod pivotally secured to the casing, a guide swivel mounted on the casing, a rod secured thereto,,a secondswivel on the door in which the rod'is slidably mounted, alever mounted on the door and having a flange movable acrossthe free end of said rod and gravity actuated means to automatically position said flange on the axis of the rod in juxtaposition to the free' end thereof when the door is in closed position.

This specification signed and witnessed this 9th day of May A. D., 1912.

HUBERT F. FRANKLIN. Signed in the presence of r E. M. TAYLOR, I 'WOR'IHINGTON CAMPBELL. 

